How do you evaluate #8+ ( - 1) + 9+ ( - 4) #?

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Answer 1 · 2017-09-15T01:34:31

#12#

Remove the parenthesis

#8+##-1+9+##-4#

Simplify

#8-1+9-4#

Recall: Combing a positive (+) and a negative (-) will result in a negative or minus sign

Now we evaluate the expression:

#8-1+9-4#

#7+9-4#

#16-4#

#12#